Yeah, but I don't think that means Kallig = Hord or even that he's very close, tbh. Sidious also declares Maul and Savage as his "rivals" but we all know he's eons above either of them individually. Kallig could've been Hord's rival in different ways as he may have threatened his rule in various ways; we don't know if he was actually his rival in terms of power or skill.